JPH0439179Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sealing structure for a container having a hermetic structure.

(Prior art) This type of airtight container has a packing surrounding the rim of the container, O-
A container is provided with a ring or other sealing material and sealed with a lid, and has a latch member that secures the container and the lid. Therefore, although the sealing material is strongly pressurized at the location of the latch member, the pressure applied to other locations becomes weaker, and in some cases, sufficient sealing performance may not be obtained.

(Technical Problem) The present invention was devised in view of the above points, and its purpose is to provide a sealing structure for a closed container that can perform more effective sealing with a smaller acting force.

(Technical Means) In order to achieve the above object, the present invention provides a sealing material 3 on the edge of the lid 2 that presses against the opening edge of the container body 1, and a hanging edge 11 that fits inside the opening edge of the lid 2.
Continuous grooves 5 are formed on the inner side of the opening and provide corner portions 4 for receiving the sealing material 3 when the lid is closed and causing compressive deformation at the pressure contact point to increase the pressing force. It has a groove-like structure.

(Function of the invention) In the present invention, a concave strip 5 is provided along the opening edge of the container body 1 to provide a corner 4 that causes compressive deformation at the press-contact location of the sealing material 3.
The pressing force increases as the grooves 5 are pressed against the corners 4, 4 on both sides, and since the grooves 5 are continuously provided along the edge of the opening of the container, there is a double inner and outer layer around the entire circumference. A sealing effect can be obtained.

When grooves 5 are provided on the edge of the opening, portions corresponding to the corners 4 are formed on both sides of the bottom of the grooves 5 and on both sides of the entrance of the grooves 5. This is because it can exhibit the above-mentioned effects. Further, since the groove 5 receives a part of the sealing material 3, the sealing material 3 is always stable and the sealing action is always good.

(Example) To explain in detail using the illustrated example, the airtight container of this example consists of a container body 1, a lid 2, and a pair of latching members 7 pivotally supported on the left and right sides of the container body 1, all of which are molded from synthetic resin. The upper surface of the opening edge of the container is a flat surface 6 that protrudes outward with a predetermined width, and the sealing material 3 fitted into the groove 9 of the lid periphery that protrudes opposite to this flat surface is pressed and deformed. Sealing groove 5
are provided over the entire circumference of the plane 6.

Figures 3 and 4 show examples in which the grooved line 5 and the sealing material 3 have approximately the same width, and the grooved line 5 has a smooth shape with a radius smaller than the curvature of the sealing material 3, which has an approximately oval cross section. Since the bottom is made up of the inner corner parts 4a, 4a, when the sealing material 3 is deformed by tightening the lid, the inner corner parts 4a,
The pressing force against 4a increases (shaded area). The sealing material 3 may be hollow or solid.

The examples shown in FIGS. 5 and 6 are cases in which the grooved strip 5 is narrower than the sealing material 3. The sealing material 3 has a substantially hexagonal cross section, and the grooved strip 5 has an inverted triangular cross section into which the lower end of the grooved strip 5 is fitted. , the outer corner portions 4b, 4b of the entrance portion press against the sealing material 3, increasing the pressing force. Seal material 3
The other end does not need to be closed. (Figure 6b).

7 and 8 are examples of a structure in which a slightly wide sealing material 3 is fitted between one protrusion 8, 8 protruding on the plane 6, and a narrow grooved line 5 is provided between the protrusion 10. The sealing material 3 has a rectangular cross section. In this example, as in the second example, the pressing force is increased at the outer corner portions 4c, 4c following the protrusions 8, 8, which are integral with the entrance portion of the grooved strip 5. In each figure, reference numeral 10 indicates an operation button for eliminating the pressure difference between the inside and outside of the container, and 11 indicates a hanging edge that fits into the opening of the container.

(Effect of the invention) The present invention is constructed as described above, and since the container body 1 and the lid 2 are always assembled in a constant positional relationship by the hanging edge 11, the sealing material is pressed against the opening edge of the container body 1. 3 is also maintained in an ideal positional relationship over the entire circumference, and a part of the groove 5 enters,
In addition, as the pressing force is increased at the corners 4 on both sides, unlike simply interposing the sealing material between the container and the lid and expecting a pressing effect from the entire width of the sealing material, it is possible to achieve close contact around the entire circumference with a weaker acting force. Since the wires are double-layered on the inside and outside, a more complete sealing effect can be obtained, and the sealing material 3 also has the characteristic of not causing excessive deformation and fatigue.

[Brief explanation of the drawing]

The drawings show an embodiment of the sealing structure for an airtight container according to the present invention. Fig. 1 is a plan view of the airtight container, Fig. 2 is a partially cutaway side view, and Fig. 3 is a cross-section of the main part of the first embodiment. Figures 4a and 4b are sectional views of two types of sealing members, Figure 5 is a sectional view of essential parts of the second embodiment, Figures 6a and b are sectional views of two types of sealing members, and Figure 7 is a sectional view of two types of sealing members. The figure is a sectional view of the main part of the third embodiment, and FIG. 8 is a sectional view of the seal member. 1... Container body, 2... Lid, 3... Sealing material,
4...Corner, 4a...Inner corner, 4b, 4c...Outer corner, 5...Concave strip, 6...Flat surface of opening edge.

Claims (1)

[Claims for Utility Model Registration] (1) A sealing material 3 that presses against the opening edge of the container body 1 is provided on the mouth edge of the lid 2, and a hanging edge 11 that fits inside the opening edge is formed on the inside of the lid 2. Then, a concave strip 5 is provided in a continuous groove shape on the flat surface 6 of the opening edge to provide a corner 4 for receiving the sealing material 3 and causing compressive deformation at the pressure contact point to increase the pressing force when the lid is closed. A seal structure for an airtight container characterized by: (2) The sealing structure for an airtight container according to claim 1, wherein the concave groove 5 has approximately the same width as the sealing material 3 and has a pair of smooth inner corner portions 4a, 4a on both sides of the bottom. (3) A pair of outer corner portions 4b, 4 formed between the groove 5 and the opening edge flat surface 6, which are narrower than the sealing material 3;
A sealing structure for an airtight container according to claim 1 of the utility model registration claim having the following features: b, 4c, and 4c.